log4j configuration xml

the three main components of the log4j configuration file: Logger,appender and layout, respectively, log type, log output destination, log output format.Log4j.rootlogger = [Level],appendername, Appendername, ... (Level is the error levels, Appendername is the output destination, this example is set to MyLog, you can define multiple) level priority is fatal, ERROR, WARN, INFO, DEBUG 5 levels. By defining th

Http://blog.csdn.net/wiwipetter/archive/2009/07/30/4390579.aspx1. log4j output multiple custom log filesThe powerful function of log4j is unquestionable, but in practical application it is unavoidable to have a function to output independent log files, how to separate the required content from the original log, and form a separate log file. In fact, as long as the existing

First, log4j configuration The first step: Join Log4j-1.2.8.jar to Lib. Step two: Establish the log4j.properties under the classpath. The contents are as follows: If you put it under SRC, you don't have to configure it or you have to go to Web.xml to configure a listener Reference: Log4j.rootcategory=info, stdout, R log4j.appender.stdout=org.apache.log4j.console

which the output log information belongs %l The occurrence of the output log event where the statement that outputs the log information is in the first line of the class it is in %m The information specified in the output code, such as a message in log (message) %n Output a carriage return newline character, Windows platform is "RN", UNIX platform is "n" %p output priority, or debug,info,warn,error,fatal. Debug if the debug () output is called, and so on %r The number of mil

of the class to which the output log information belongs %l The occurrence of the output log event where the statement that outputs the log information is in the first line of the class it is in %m The information specified in the output code, such as a message in log (message) %n Output a carriage return newline character, Windows platform is "RN", UNIX platform is "n" %p output priority, or debug,info,warn,error,fatal. Debug if the debug () output is called, and so on %r The nu

############################## Log4j.appender.r=org.apache.log4j.jdbc.jdbcappendeLog4j.appender.r.url=jdbc:mysql://localhost/log4jdemLog4j.appender.r.user=defaulLog4j.appender.r.password=defaultLog4j.appender.r.sql=insert into jdbctest (message) VALUES ('%d-%c-%p-%m ')##################################################The first line tells Log4j,r is the type of jdbcappender. The second line declares the URL of the database that we want to log.The third

Configure interval time, print log periodicallyreceived a demand, through the log4j time print log, requirements described as follows: the need to be able to print the log regularly, the interval can be matched. When it comes to timing, first think of the Dailyrollingfileappender class, various timing, according to Datepattern, this can refer to class SimpleDateFormat class, common some of the regular settings are as follows: '.' YYYY-MM: Month

characters to control their minimum width, maximum width, and text alignment. Such as: 1)%20c: Specify the name of the output category, the minimum width is 20, if the category name is less than 20, the default is the right alignment. 2)%-20c: Specify the name of the output category, the minimum width is 20, if the category name is less than 20, the "-" number specifies left-aligned. 3)%.30c: Specify the name of the output category, the maximum width is 30, if the cat

log4j log File configuration ------------------------------------------------------------------------ first, the log device configuration # root Logger (other logs are inherited from this logger) # Default Level=debugLog4j.rootlogger=info, A1, A2 (a1,a2 for Appender) # Level of the log Log4j.logger.a=info,a1 Log4j.logger.a.b=debug,a1,a2 The log's inheritance rela

During the development process, we use the log4j to output the logs, and we want to see only a subset of the log information at the time of unit testing, or to define the level of log output. This time manually specify the log4j configuration file: The following are the specific practices: The definition classes are as follows: Import java.io.FileNotFoundExcept

=org.apache.log4j.PatternLayoutlog4j.appender.service.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss,SSS} [%p] - %m%n#systemlog4j.logger.com.system= DEBUG, systemlog4j.appender.system= org.apache.log4j.RollingFileAppenderlog4j.appender.system.MaxFileSize=5mblog4j.appender.system.Append=true log4j.appender.system.File=${catalina.base}/logs/system.loglog4j.appender.system.layout=org.apache.log4j.PatternLayoutlog4j.appender.system.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss,SSS} [%p] - %m%

-dd log4j.appender.debug.Threshold = Debug Log4j.appender.debug.append=true Log4j.appendeR.debug.file=${webapp.root}/web-inf/logs/debug.log Log4j.logger.error=error log4j.appender.error= Org.apache.log4j.DailyRollingFileAppender Log4j.appender.error.layout=org.apache.log4j.patternlayout LOG4J.APPENDER.ERROR.LAYOUT.CONVERSIONPATTERN=[%-5P] [%d{hh:mm:ss}]%c-%m%n log4j.appender.error.datepattern= '. ' Yyyy-mm-dd log4j.appender.error.Threshold = Error Log4j.appender.error.append=true log4j.appender.

When two or more projects are deployed under Tomcat, it is best to define the Webapprootkey parameters in the Web.xml file, which, if not defined, will default to "Webapp.root", as follows: Best newspaper The parameter values for each item are different to avoid project conflicts Serious: Exception sending context initialized event to listener instance of class Org.springframework.web.util.Log4jConfigLis TenerJava.lang.IllegalStateException:Web App root system property already set to different

A brief introduction to the use of Org.apache.log4j.Logger in the MAVEN project.[1] First we need to find the coordinates of Org.apache.log4j.Logger and configure to Pom.xmlDependency> groupId>Log4jgroupId> Artifactid>Log4jArtifactid> version>1.2.14version> Scope>ProvidedScope>Dependency>[2] By default, you need to add a configuration file under the Src/main/java folder Log4j.properties, the specific content can be referenced below a simple example:Lo

log4j the log of the generated program.First you need a configuration file:log4j.propertiesLog4j.rootlogger = Debug, stdout, D, Elog4j.appender.stdout = org.apache.log4j.ConsoleAppenderlog4j.appender.stdout. Target = System.outlog4j.appender.stdout.layout = Org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern =%d{absolute}%5p%c{1}:%l-%m% NLOG4J.APPENDER.D = Org.apache.log4j.dailyroll

dimension of the Num class name output (such as: "Org.apache.elathen.ClassName",%c{2} will output elathen. ClassName) %d output log time in the format of%d{yyyy-mm-dd hh:mm:ss,sss}, you can specify a format such as%d{hh:mm:ss} %l output Log event occurrence location, including class name, occurrence thread, number of lines in code %n line break %m output code to specify information, such as info ("message"), output message %p output priority, that is, FATAL, ERROR, etc. %r output the number of

%nLog4j.appender.serverdailyrollingfile.append=trueLog4j.appender.stdout=org.apache.log4j.consoleappenderLog4j.appender.stdout.layout=org.apache.log4j.patternlayoutLOG4J.APPENDER.STDOUT.LAYOUT.CONVERSIONPATTERN=%D{YYYY-MM-DD hh\:mm\:ss}%p [%c]%m%n4. New Test classpublic class Testslf4j {public static void Main (string[] args) {Propertyconfigurator.configure ("Log4j.properties");Logger Logger = Logger.getlogger (Testslf4j.class);Logger.info ("yes");Org.slf4j.Logger logger2 = Loggerfactory.getlogg

flexibility to specify layout mode), 　　Org.apache.log4j.SimpleLayout (contains the level and information string for log information), Org.apache.log4j.TTCCLayout (contains information about the time, thread, category, and so on) log4j formats the log information in print format similar to the printf function in C, and prints the following parameters:%m The message specified in the output code %p The output priority, which is Debug,info,warn,error

1. New Java Project Log4test2, New directory lib, the Log4j-1.2.9.jar package into the Lib directory3, right-click Project, choose Properties->java Build path->libraries->add JARs ..., select the Log4j-1.2.9.jar under Lib4. Create two new files in src directory log4j.properties and Log.txtThe Log4j.properties file is configured as follows:log4j.appender.stdout.layout.conversionpattern=%d%p [%c]-%m%nLog4j.ap

Add slf4j-api-1.6.1,slf4j-log4j12-1.6.1,log4j-1.2.15 three jar packages to the Lib folder to use the log4j log file. Specifically configured in the Log4j.properties file. Different configurations of the file can be modified to achieve different functions. For example Log4j.rootlogger=warn, stdout modified to Log4j.rootlogger=error, stdout. Only errors are displayed. Specific as followsDebug Debugging Inform